78825065 has 16 divisors (see below), whose sum is σ = 103648896. Its totient is φ = 57072000.

The previous prime is 78825049. The next prime is 78825101. The reversal of 78825065 is 56052887.

It is not a de Polignac number, because 78825065 - 2⁴ = 78825049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9740 + ... + 15890.

It is an arithmetic number, because the mean of its divisors is an integer number (6478056).

Almost surely, 2^78825065 is an apocalyptic number.

It is an amenable number.

78825065 is a deficient number, since it is larger than the sum of its proper divisors (24823831).

78825065 is a wasteful number, since it uses less digits than its factorization.

78825065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 78825065 is about 8878.3481008575. The cubic root of 78825065 is about 428.7670921116.

The spelling of 78825065 in words is "seventy-eight million, eight hundred twenty-five thousand, sixty-five".